Condenser



J. F. LINDBERG CONDENSER Dec. 29 1925- 7 1,567,067

Filed July 20, 1922 Patented Dec. 29,

UNITED STATES 1,567,067 PATENT OFFICE.

JOHN F. LINDBERG, OF CHICAGO, ILLINOIS, ASSIGNOR TO RELIANCE DIE ANDSTAMP- ING COMPANY, OF CHICAGO; ILLINOIS, A CORPORATIONOF ILLINOIS.

CONDENSER.

Application filed July 20, 1922. Serial No. 576,227.

- useful Improvement in Condensers, of Which the following is a full,clear, concise, and exact description.

My invention relates to electrical condensers and has for its object theprovision of improved adjusting mechanism for varying the capacitythereof.

The condenser of my invention includes the two complemental sidesthereof and an adjusting device, individual to each side,

capable of adjusting such side along the other side in a rectilinealdirection.

In the preferred embodiment of the invention the adjusting mechanism forone of the condenser sides is adapted to effect rapid adjustment of thisparticular condenser side to secure approximate regulation of thecondenser capacity. The adjusting device for the other condenser sideserves to move such other side slowly with respect to the adjustingmotion to secure a fine adjustment that supplements the coarseadjustment in completing the regulation of the condenser capacity.

I will explain my invention more fully by reference to the accompanyingdrawing in which Fig. 1 is a sectional view, partially in elevation, ofa condenser constructed in accordance with one embodiment of theinvention; Fi 2 is a View in elevation of the condenser s own in Fig. 1;Fig. 3 is a sectional view on line 3-3 of Fig. 1; Figs. 4 and 5 areperspective views illustrating component parts of one of the adjustingdevices; and Fig. 6 is a view in elevation illustrating another form ofthe invention.

Like parts are indicated by similar characters of reference throughoutthe different figures.

The form of the invention illustrated in Figs.1 to 5 inclusive -will befirst described.

The condenser shown in these figures has one condenser'side composed ofcoaxial or nested cups 1 and the other condenser side composed ofco-axial or nested cups 2, the cups of both condenser sides beingco-axial and therefore parallel. The cups 1 are elec- I tricallyconnected by a support 3 and the .cups 2 are electrically connected'by asupport 4. The support 3 is provided with a of the knob 13.

central hub portlon 5 that is in the nature of a sleeve which isinteriorly threaded. A shaft 6 is also threaded, as indicated at 7, to

have threaded engagement with the threads upon the interior of the hub5, the threading upon the elements 5 and 6 being preferably fine so thatwhen the shaft is turned with respect to the hub the movement of thecondenser side 1 will be slow with respect to the turning movement ofthe shaft which is preferably effected by turning the knob 8 upon theshaft.

The base 3 of the condenser side 1 slides upon pins 9 which are carriedupon the cabis net wall l0 whereby this condenser side is prevented fromrotating but is forced to move longitudinally of the shaft 6 as thisshaft is turned, longitudinal movement of the shaft being prevented bythe cabinet wall portion 10 which surrounds a reduced portion 11 of theshaft and which is interposed between a larger portion of the shaft andthe head of the assembling screw 12 that is screwed into the outer endof the shaft. Said shaft is journaled at one end in the wall 10 at itsreduced portion 11; It is journaled at its other end in another knob 13which is provided upon a hollow or. quill shaft 14 that is disposed in ahearing 15 provided in another cabinetwall portion 16. The quill shaft14 is formed with a long spiral slot 17 whichreceives the pin 18 carriedupon the sleeve 19 that surrounds the shaft 6 that constitutes a bearingfor this sleeve. The base 4 of the condenser side 2 is mounted upon thesleeve 19 and this condenser side is prevented from turning by means ofa stationary key 20 that enters a lon itudinal slot 21 formed in thesleeve. The ob 13 carries an index or pointer 22 and the knob 8 carriesan index or pointer 23. The'pointer \22 moves in front of a dial plate24 registering marks thereon. The pointer 23 moves in front of theregistering marks formed upon the front face I In adjusting the capacityof the condenser the knob 13 is turned to turn the quill shaft 14 andcause the rapid rectilineal and non-rotary movement of the condenserside 2 to secure an approximate adjustment of the condenser capacity.After this ap roximate adjustment has been se-' cured t e adjustment iscompleted by the fine regulation that is elfected by turning the knob 8,the engaging tl reads upon the interior of the hub portion 5 and theshaft 6 being of slight pitch.

The condenser shown in Fig. 6 does not employ nested cupsbut has itssides formed of flat plates. The mechanism for adjusting the condensersides of the structure shown in Fig. G'is similar to that which isemployed in connection with the structure shown in Figs. 1 to 5inclusive, and like parts are given similar characters of reference.

While I ,have herein shown and particularly described both forms of myinvention I do not Wish to be limited to the precise details ofconstruction shown as changes may readily be made Without departing Vfrom the spirit of my invention, but having thus. described my inventionI claim as new and desire to secure by Letters Patent the following 1. Acondenser including two substantially parallel sides both mounted tomove along a straight line; and an adjusting device individual to eachcondenser side for moving it with respect to the other condenser side,said adjusting devices being constructed to adjust the condenser sidespertaining thereto at different rates.

2..A condenser including two sides both mounted to ,move along astraight line; and an adjusting device individual to each condenser sidefor moving it with respect to the other condenser side, said adjustingdevices being constructed to adjust the .condenser sides pertainingthereto at different rates.

tially parallel sides both mounted to move along a straight line; an adusting device individual to each condenser side for mov- 40 ing it withrespect to the other condenser side; and means for preventing thecondenser sides from turning.

4:. A condenser including two substan tially' parallel sides bothmounted to move along a straight line; an adjusting device individual toeach condenser side for'moving it ,With respect to the other condenserside, said adjusting devices being constructed to adjust the condensersides pertaining mounted to move along a straight line; an

adjusting device individual to each condenser side for moving 1t withrespect to the other condenser side; and means for preventing thecondenser sides from turn- 6. A condenser including two sides bothmounted to move along a straight line; an

adjusting 'device individual to each condenser side for moving it withrespect to the other condenser side, said adjusting devices beingconstructedtoadjust the condenser sides pertaining thereto at differentrates; and means for preventing the condenser sides from turning.

In witness whereof, I hereunto subscribe my name this eleventh day ofJuly, A. D.

JOHN F. LINDBERG.

